Abstract: In general, large span of continuous prestressed concrete girder bridges only place one fixed buttress. For the bridge span is longer, the vertical seismic response of a fixed pier is also correspondingly larger. Using response spectrum, the impact of the seismic response of different types of bearings bound for a fixed bridge pier and fixed bearing is discussed. The results show that different types of restraint bearing have a greater impact on the seismic response of continuous bridge. At the same time, the impact of pile-soil interaction on continuous bridge dynamic characteristics and the seismic response is also analyzed. The results of this research can provide references for the anti-seismic design of similar bridges.

Key words: continuous girder bridge , seismic response , response spectrum , peg-soil effect , mobile support , fixed support ;

摘要： 大跨长联预应力混凝土连续梁桥一般只设一个固定支座,由于桥跨较长,因此固定墩承担的纵向地震响应也就相当大。采用反应谱法,讨论了不同支座约束类型对连续梁桥固定墩和固定支座地震响应的影响;计算结果表 明,不同的支座约束类型对连续梁桥地震响应影响较大;同时还分析了桩??土相互作用对连续梁桥动力特性及地震 响应的影响。

关键词: 连续梁桥, 地震响应, 反应谱, 桩土效应, 活动支座, 固定支座